Filter for aquariums



FIG. 1 is a top perspective view of a filter for aquariums showing our new design;

FIG. 2 is a side elevational view thereof, all sides being identical, on a reduced scale;

FIG. 3 is a top plan view thereof, on a reduced scale; and

FIG. 4 is a bottom plan view thereof, on a reduced scale. 

The ornamental design for filter for aquariums, as shown and described. 